2026 data ClinicalTrials.gov official source

Conditions: C

Compiled by PlainTrial, Clinical Trial Intelligence Editorial Process · January 1, 2026

Every condition beginning with C that has a registered US clinical trial, with how many studies cover each.

2,954 conditions starting with "C"

Showing 1,701–1,750 of 2,954

Condition	Trials	Recruiting
Claustrophobia	3	-
Clavicle	1	1
Clavicle Fracture	3	1
Clavicle Injury	1	-
CLE	1	1
Clear Cell Adenocarcinoma	2	-
Clear Cell Adenocarcinoma of Cervix	1	1
Clear Cell Adenocarcinoma of Fallopian Tube	1	1
Clear Cell Adenocarcinoma of Ovary	1	1
Clear Cell Adenocarcinoma of Peritoneum	1	1
Clear Cell Adenocarcinoma of Uterus	1	1
Clear Cell Adenocarcinoma of Vagina	1	1
Clear Cell Adenocarcinoma of Vulva	1	1
Clear Cell Carcinoma	4	2
Clear Cell Endometrial Carcinoma	1	1
Clear Cell Ependymoma	1	-
Clear Cell Histology	1	1
Clear Cell Mullerian Tumor	1	-
Clear Cell Ovarian Carcinoma	1	1
Clear Cell Papillary Renal Tumor	1	-
Clear Cell Renal Cancer	1	1
Clear Cell Renal Carcinoma	2	1
Clear Cell Renal Cell Cancer (ccRCC)	2	2
Clear Cell Renal Cell Carcinoma	46	14
Clear Cell Renal Cell Carcinoma (ccRCC)	6	5
Clear Cell Renal Cell Carcinoma Metastatic	2	1
Clear Cell Sarcoma	1	1
Clear Cell Sarcoma (CCS)	1	1
Clear Cell Sarcoma of Soft Tissue	2	-
Clear Cell Sarcoma of the Kidney	3	-
Clear-cell Metastatic Renal Cell Carcinoma	3	2
Cleft Lip	4	-
Cleft Lip and Palate	6	4
Cleft Lip/Palate	1	-
Cleft Palate	10	2
Cleft Palates	1	-
Clinical Alarms	2	1
Clinical Assessment	1	1
Clinical CT Abdomen/Pelvic With Oral Contrast and Sedation	1	-
Clinical Decision Support	2	1
Clinical Decision Support Systems	2	-
Clinical Decision-making	1	-
Clinical Depression	1	1
Clinical Deterioration	4	1
Clinical Documentation	1	-
Clinical High Risk for Psychosis	2	1
Clinical High Risk for Psychosis (CHR)	2	2
Clinical High-Risk	4	3
Clinical Judgement Assessment	1	1
Clinical Masaoka Stage II to IVA	1	-

Data sourced from official public datasets. See our methodology for details.